Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for credit losses	$ 170	$ 158
Share-based compensation expense	26	16
State income taxes	24	17
Accrued compensation	77	44
Loans and debt securities	113	0
Lease liability	105	70
Other accruals	19	10
Net operating loss	7	7
Goodwill and intangibles	0	3
Foreign tax credit carryforward	0	9
SBA loan fees	3	6
Other	10	8
Deferred tax assets	554	348
Valuation allowance	(7)	(7)
Net deferred tax assets after valuation allowance	547	341
Deferred tax liabilities:
Derivative equity warrant assets	(82)	(71)
Net unrealized gains on cash flow hedge derivatives	(33)	(50)
Net unrealized gains on AFS debt securities	0	(186)
Non-marketable and other equity securities	(219)	(119)
Premises and equipment	(41)	(24)
Right-of-use asset and deferred rent assets	(81)	(52)
Goodwill and intangibles	(24)	0
Contingent payments	(9)	0
Merger-related fair value adjustments	(28)	0
Other	(6)	(11)
Deferred tax liabilities	(523)	(513)
Net deferred tax assets (liabilities)	$ 24
Net deferred tax liabilities		$ (172)